摘要:
The present invention relates to a method for determining the amount of the specific analyte of a sample which may show interferences by photometric assays, wherein the specific analyte is quantified from the change in the optical signal of the reaction mixture after the interaction of the analyte with analyte specific assay reagents. Multiple calibration curves are generated for multiple wavelengths for the specific analyte of a sample to be determined, the measurement results are deposited in a data management system of the instrument platform. An interference test is performed simultaneously to the determination of the specific analyte, for quantifying the amount of interfering substances present in the sample to be determined. The amount of each interfering substances is compared to predetermined cut-off values. The optical signal for the specific analyte of a sample to be determined is measured in the reaction mixture at multiple wavelengths over the complete reaction time, and a calibration curve is selected depending on the interfering substances. Finally, the amount of the specific analyte of a sample to be determined is quantified by comparison with the selected calibration curve for the chosen wavelengths.
摘要:
The invention provides for a medical system (700) for determining a quantity of an analyte (602, 602') in a blood sample (600) using a cartridge (100). The medical instrument comprises the cartridge. The cartridge is operable for being spun around a rotational axis (102), wherein the cartridge comprises: an inlet (108) for receiving the blood sample; a blood separation chamber (118) for separating blood plasma from the blood sample, wherein the blood separation chamber is fluidically connected to the inlet; a processing chamber (124) containing at least one reagent comprising at least one specific binding partner (611) which is operable to bind to the analyte to form at least one analyte specific binding partner complex; a first valve structure (122) connecting the blood separation chamber to the processing chamber; a measurement structure (130) for enabling measurement of the quantity of the analyte, wherein the measurement structure comprises a chromatographic membrane (134), wherein the chromatographic membrane comprises an immobilized binding partner (620) for direct or indirect binding of the analyte or the at least one analyte specific binding partner complex, wherein the measurement structure further comprises an absorbent structure (132), wherein the absorbent structure is nearer to the rotational axis than the membrane; a second valve structure (128) connecting the processing chamber to the measurement structure; and a fluid chamber (136, 136') filled with a washing buffer (1202), wherein the fluid chamber is fluidically connected to the measurement structure, wherein a seal keeps the washing buffer with the fluid chamber.
摘要:
The invention provides for a method of dispensing a mixture of particles (119) and reagent fluid (116) using a cartridge (102). The cartridge comprises: a first reservoir (114) at least partially filled with a reagent fluid (116); a second reservoir (118) at least partially filled with particles (119); a pumping chamber (126); at least one first pumping chamber conduit (120, 120') connecting the first reservoir and the pumping chamber; at least one second pumping chamber conduit (122, 122') connecting the second reservoir and the pumping chamber; an outlet (124) for dispensing the reagent fluid and the particles from the cartridge; an outlet conduit (130) connecting the outlet to the pumping chamber; and a valve (132) for sealing the outlet conduit. The method comprises the steps of: closing (200) the valve; applying (202) a force to transport a first defined volume of reagent fluid and second defined volume of particles into the pumping chamber to form a mixture of reagent fluid and particles; opening (204) the valve; and forcing (206) the mixture from the pumping chamber to dispense the mixture from the outlet.
摘要:
The invention provides for a method of determining an amount of an analyte in a blood sample (500) using a cartridge (100, 300, 600) and a blood collector (400, 800, 1200, 1513). The blood collector comprises: a mounting surface (402); a capillary structure (404) for holding the blood sample, wherein the capillary structure comprises a curved portion (406); a capillary inlet (403) for receiving the blood sample. The cartridge comprises: a receiving surface for attaching to the mounting surface; a cartridge inlet (108) for receiving the blood sample from the blood collector; a microfluidic structure (111) for processing the blood sample into a processed sample; a measurement structure (130) for enabling measurement of the processed sample to determine the amount of the analyte in the blood sample; wherein the method comprises: placing (1100, 1400) the blood sample into the capillary inlet; attaching (1104, 1404) the mounting surface to the receiving surface; rotating (1600) the cartridge about the rotational axis to transport the blood sample from the capillary structure to the cartridge inlet; rotating (1602) the cartridge about the rotational axis to transport the blood sample from the cartridge inlet into the microfluidic structure; controlling (1604) the rotation of the cartridge about the rotational axis to process the blood sample into the processed sample using the microfluidic structure; controlling (1606) the rotation of the cartridge to transfer the processed sample to the measurement structure; and measuring (1608) the amount of the analyte using the measurement structure and a measurement system.
摘要:
The present invention relates to a method for determining the amount of the specific analyte of a sample which may show interferences by photometric assays, wherein the specific analyte is quantified from the change in the optical signal of the reaction mixture after the interaction of the analyte with analyte specific assay reagents. Multiple calibration curves are generated for multiple wavelengths for the specific analyte of a sample to be determined, the measurement results are deposited in a data management system of the instrument platform. An interference test is performed simultaneously to the determination of the specific analyte, for quantifying the amount of interfering substances present in the sample to be determined. The amount of each interfering substances is compared to predetermined cut-off values. The optical signal for the specific analyte of a sample to be determined is measured in the reaction mixture at multiple wavelengths over the complete reaction time, and a calibration curve is selected depending on the interfering substances. Finally, the amount of the specific analyte of a sample to be determined is quantified by comparison with the selected calibration curve for the chosen wavelengths.